Mohamed Hichem Gazzah

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In this work, we simulate the binding reaction of C-reactive protein in a microchannel of a biosensor. A problem that arises in this device concerns the transport of the analyte toward the reaction surface of the biosensor, which is of a very small dimension. The limitation of mass transport causes the formation of a diffusion boundary layer and restrains(More)
The effects of a co-flow on a spreading and entrainment rate of turbulent round jets have been studied numerically. The first and second order closure models are used and have been compared with existing experimental data. The influence of theses models on the dynamic fields is examined. The results of the models in general agree well with the trends(More)
This paper studies the impact of III-Nitride polarization on p-GaN/n-InGaN devices grown with N-polar orientations in photovoltaic properties. A new model taking account of the spontaneous and piezoelectric polarizations in the photocurrent density is developed. The self-consistent model as well is used to determine the energy band conduction. Using these(More)
In this paper, we present a contribution to the development of a fiber-optic surface plasmon resonance sensor coated with a silver film that is suitable for chemical and biological applications. Indeed, the importance of the choice of the metal deposited on the sensitive zone of the sensor was verified. It has been found that silver-based sensors have(More)
Binding reaction kinetics of analyte-ligand at the level of a sensitive membrane into a microchannel of a biosensor has been limited by the formation of the boundary diffusion layer. Therefore, the response time increases and affects the overall performance of a biosensor. In the present work, we develop an approach to engineer fluid streams into a complex(More)
This paper aims to enhance the analyte transport toward the sensing area and to enhance biosensors performances. A microchannel-based flow confinement method for rapid delivery of small sample volumes to sensor surface is described. To confine the flow, a sample flow is joined with a perpendicular makeup flow and is confined into a thin layer above the(More)
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